The problem is that there's no opposite. Either way you slice it it's not a workable situation unless B&W breaks up (unlikely at this point IMHO).
A Likud breakup might be more likely if gantz is allowed by rivlin to attempt to form a government. B&W, Lieberman, and a portion of Likud could get to 61 without anyone else.
Throw in Yamina for pledges in the settlements, and you're there with less than half of Likud splitting.